include/uapi/linux/kexec.h

   1 #ifndef _UAPILINUX_KEXEC_H
   2 #define _UAPILINUX_KEXEC_H
   3
   4 /* kexec system call -  It loads the new kernel to boot into.
   5  * kexec does not sync, or unmount filesystems so if you need
   6  * that to happen you need to do that yourself.
   7  */
   8
   9 #include <linux/types.h>
  10
  11 /* kexec flags for different usage scenarios */
  12 #define KEXEC_ON_CRASH          0x00000001
  13 #define KEXEC_PRESERVE_CONTEXT  0x00000002
  14 #define KEXEC_ARCH_MASK         0xffff0000
  15
  16 /* These values match the ELF architecture values.
  17  * Unless there is a good reason that should continue to be the case.
  18  */
  19 #define KEXEC_ARCH_DEFAULT ( 0 << 16)
  20 #define KEXEC_ARCH_386     ( 3 << 16)
  21 #define KEXEC_ARCH_X86_64  (62 << 16)
  22 #define KEXEC_ARCH_PPC     (20 << 16)
  23 #define KEXEC_ARCH_PPC64   (21 << 16)
  24 #define KEXEC_ARCH_IA_64   (50 << 16)
  25 #define KEXEC_ARCH_ARM     (40 << 16)
  26 #define KEXEC_ARCH_S390    (22 << 16)
  27 #define KEXEC_ARCH_SH      (42 << 16)
  28 #define KEXEC_ARCH_MIPS_LE (10 << 16)
  29 #define KEXEC_ARCH_MIPS    ( 8 << 16)
  30
  31 /* The artificial cap on the number of segments passed to kexec_load. */
  32 #define KEXEC_SEGMENT_MAX 16
  33
  34 #ifndef __KERNEL__
  35 /*
  36  * This structure is used to hold the arguments that are used when
  37  * loading  kernel binaries.
  38  */
  39 struct kexec_segment {
  40         const void *buf;
  41         size_t bufsz;
  42         const void *mem;
  43         size_t memsz;
  44 };
  45
  46 /* Load a new kernel image as described by the kexec_segment array
  47  * consisting of passed number of segments at the entry-point address.
  48  * The flags allow different useage types.
  49  */
  50 extern int kexec_load(void *, size_t, struct kexec_segment *,
  51                 unsigned long int);
  52 #endif /* __KERNEL__ */
  53
  54 #endif /* _UAPILINUX_KEXEC_H */